Originally Posted by Capt Tony
Where you able to remove your microwave? I need to replace mine
What year is the boat?
The OP wasn't really clear with what the problem was. If it's on the counter, it should be affixed from below. You'll need to either remove the fridge or a few drawers depending on whichever gives you the easiest access. You should find the fasteners going up through the counter.
If it's suspended from underneath the cabinet, you should be able to drop the microwave by removing the fasteners from the upper cabinet. Some had a box suspended from the cabinet that required the entire mount had to be removed.